State four factors that may lead to an increase in demand for a product.

1. Increase in consumer income: When consumers have more disposable income, they are more likely to spend on goods and services, leading to an increase in demand for products.

2. Changes in consumer preferences: If there is a shift in consumer preferences towards a particular product, demand for that product is likely to increase.

3. Marketing and advertising efforts: Effective marketing and advertising campaigns can create awareness and generate interest in a product, leading to an increase in demand.

4. Seasonal factors: Demand for certain products may increase during specific seasons or holidays, such as demand for winter clothing during the winter season or demand for gifts during the holiday season.

1. Population growth: As the population grows, the demand for goods and services increases.
2. Income growth: As people's incomes rise, they can afford to buy more goods and services.
3. Technological advancements: New technologies can create new products or improve existing ones, which can lead to an increase in demand.
4. Changes in consumer preferences: As consumer preferences change, the demand for certain products can increase or decrease.